E7 is a room temperature nematic liquid crystal mixture with a high positive dielectric anisotropy and a high chemical stability. Because of its relatively high nematic-to-isotropic transition temperature, it is suitable for mid-infrared laser applications, where the absorption of laser light is not negligible and gives rise to a certain heating of the medium. In this paper we give a measurement of the refractive indices of the liquid crystal E7 at a wavelength of 10.6 µm as a function of temperature. An empirical formula to represent the experimental data is also provided.
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Document Type: Research Article
Istituto Nazionale di Ottica Applicata Largo E. Fermi 6-50125 Firenze Italy
INFM and Dipartimento di Fisica dell'Universita' di Pisa Via Buonarroti 2 56127 Pisa Italy
Publication date: 01 August 2003
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